Exercise machine



FIG. 1 is a front perspective view of an exercise machine showing my newdesign in an open condition;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is another front perspective view thereof;

FIG. 4 is a side elevational view thereof in _a closed condition;

FIG. 5 is a side perspective view thereof; and,

FIG. 6 is a front elevational view thereof.

The ornamental design for the exercise machine, as shown and described.